My Sol roll number was lost how to find it

Hi,

Since you have not mentioned the exam or the course or anything for which the ID card is lost, it is slightly difficult for us to give you an exact answer. However, you can check the admit card or the registration certificate or you may check the official website where you had applied for the course or the exam to know your roll number. If you are looking for your college or school roll number, then you can surely ask that to your Head of the Department or any teacher who is in-charge of the course.

Hope this helps.